Effect of Nano Chitosan and Nano Micronutrients on Fruit Drop, Yield and Quality of Guava (Psidium guajava L.)

Author: Rishabh Mishra, Saket Mishra and Riddhima Tripathi

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Abstract

The present investigation was carried out at the Research Farm, Department of Horticulture, SHUATS, Prayagraj, on Guava cv. Allahabad Safeda from January 2022 to July 2022 with find out the effect of suitable treatments of nano chitosan and nano micronutrients in relation to fruit drop, fruit set, yield, and quality of guava. The statistical design adopted for the experiment was randomized block design (RBD) with three replications and nine treatment combinations viz., T1 (ZnO @ 150 ppm), T2 (FeO@ 100ppm), T3 (Borax @ 100 ppm), T4 (Chitosan @250ppm), T5 (ZnO @ 150 ppm + chitosan @250ppm), T6 (FeO@ 100ppm + chitosan @250ppm), T7 (Borax@100ppm + chitosan @250ppm), T8 (ZnO @ 150 ppm + Borax @100ppm + chitosan @250ppm), T9 (ZnO @ 150 ppm+ FeO@100ppm+chitosan @250ppm). The treatments were applied by soil drenching at the initiation of the experiment, pre-flowering stage and the last one at the time of the fruit setting stage to assess the effect on fruit set, fruit drop, yield and quality of Guava. Application of nano chitosan and nano micronutrients with combined application played an important role in relation to the vegetative as well as reproductive growth of plants in the form of physiological role in plants as cell division in plants and increased yield and quality parameters. The results of the present investigation revealed that, the treatment outstanding in all the aspects like; as maximum fruit set (89.13%), minimum fruit drop(10.87%), non-reducing sugar (13.35%), and benefit cost ratio (2.05) were found with T9 (ZnO @ 150 ppm + FeO@100ppm + chitosan @250ppm) treatment; maximum number of flowers (287.70), number of fruits per plant (218.14), yield(26.73kg/plant), and juice content (12.50%) were recorded with T8(ZnO @ 150 ppm + Borax @ 100ppm + chitosan @ 250ppm), maximum T.S.S. (11.520Brix), ascorbic acid (174.44mg/100g), and reducing sugar(5.92%) were found under T3 (Borax @ 100 ppm); fruit diameter (9.25cm) was recorded with T7 (Borax @100ppm + chitosan @ 250ppm) and least titratable acidity(0.40%) was found with T6 (FeO @ 100ppm + chitosan @ 250ppm)treatment; and maximum fruit weight (145.20g) was recorded under treatment T2(FeO @ 100ppm). Maximum acidity% and fruit drop with remaining all above observations recorded least value were found under T0 (control) i.e., water spray.

Keywords

Nano chitosan, micronutrients, ppm, T.S.S., yield and quality

Conclusion

Based on the present investigation, it can be concluded that on behalf of various treatments were applied to enhance the yield and quality characters of guava cv. Allahabad Safeda, according to the above treatment. Treatment T8 (ZnO @ 150ppm + Borax @100ppm + chitosan @250ppm) is best recommended for the overall growth and development of plants like; number of flowers, fruit weight, fruit yield and juice content % etc. Where, treatment T9 (ZnO @ 150 ppm + FeO@100ppm + chitosan @250ppm) was found best in fruit set with minimal fruit drop and qualitative parameters like; TSS, titratable acidity, reducing, non-reducing sugar and benefit cost ratio also outstanding among the others.

References

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How to cite this article

Rishabh Mishra, Saket Mishra and Riddhima Tripathi (2023). Effect of Nano Chitosan, Nano Micronutrients on Fruit Drop, Yield and Quality of Guava (Psidium guajava L.). Biological Forum – An International Journal, 15(10): 1244-1249.